— Has Mr. Smith had an accident? —()
How did Mr. Baker get to work?
— Has Mr. Smith had an accident? —()
How did Mr. Jones get to the cinema?()
What will Mr. Lowe most likely do this afternoon?
How did Mr. Jones get to the cinema?()
不适用人体MR成像装置的磁场强度为()。
关于MR心脏检查的说法,不正确的是( )。
下列有关提高MR图像信噪比(SNR)因素的叙述,错误的是()
MR图像中常见的化学位移伪影是由于以下哪一项引起的?()